You have 800 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river,find the length and width of the plot that will maximize the area. What is the largest area that can be enclosed?
College Algebra - JJ, Monday, February 18, 2013 at 11:35am
I know how to do this with calculus, but algebraically it starts the same way.
L + 2W = 800 L = 800 - 2w
A = LW
A = 800w - 2w^2
Take the derivative: 800 -4w
800 -4w = 0 to find max.
800 = 4w
l = 400
College Algebra - Anonymous please help :), Monday, February 18, 2013 at 11:43am
College Algebra - Yan, Thursday, August 14, 2014 at 10:17am
How did it become 800-4w from 2400-2w^2?